200304163 玖、發明說明 (發明說明應敘明：發明所屬之技術領域、先前技術、內容、實施方式及圖式簡單說明） (一） 發明所屬之技術領域 本發明係關於申請專利範圍第1項中，其特徵爲之前所 載述之一種電路配置，而其特點爲用於高壓放電燈（以下簡 稱燈具）之點燈電路配置。此外，本發明亦係關於具有操作 裝置及高壓放電燈之照明系統，爲達點燈之目的，該照明 系統具有一輔助之點燈電極，而上述之電路配置之操作裝 置中則設有一端部，供該點燈電極之用。 (二） 先前技術 文件 WO 00/77826(Van den Nieuwenbhuizen)係揭示一種 具有兩個電極之高壓放電燈，其中圍繞一饋電引線至電極 之一玻璃本體具有一孔穴，而在該孔穴所位設一點上所圍 繞之玻璃電極則爲一種線環（wire loop)形式之輔助點燈電 極，該線環則係以電氣導通之形式連接於其之饋電引線上 未置設置孔穴之電極。此種配置之好處係可降低燈具之點 燈電壓。藉輔助點燈電極，在孔穴內可激發介電阻抗放電 。由是乃產生了 UV輻射，則供燈具點燈之燈具放電空間 中即產生有離子。燈具之點燈電壓，亦即點燈所須之電壓 ，即因上述之配置而得以降低，惟輔助點燈電極此際則須 高壓，至少減少了一部分之優點。 文件W 0 0 1 / 5 9 8 1 1即欲解決此種難題。其係揭示使輔助 點燈電極不直接連接於燈具之電極。進而，變壓器之一次 繞組係接在燈具之兩端間，且輔助點燈電極係接於：與一 200304163 次繞組之電壓作比較、而可階段式升高、之二次繞組電壓 上。惟此種解決方式之缺點爲變壓器之造價將甚高昂。 (三）發明內容 本發明之目的，係提供一種如申請專利範圍第1項序文 所述之電路配置，其可低廉的達成高壓放電燈之點燈。 達成此目的之電路配置的特點係如申請專利範圍第1項 後段「其特徵爲」之後所界定之內容。又者，本發明之另 一目的，係提供一種具如申請專利範圍第5項特徵之照明 系統。而本發明之其他優點及特點則可見諸各附屬請求項。 本發明之燈具係一種以交流電源饋送交流電壓之交流電 壓燈具。特別的是，關於工程之應用而言，交流電源電壓 最好爲方波形式並藉由以四只電子交換元件所組成之全電 橋予以提供之。 在傳統式無上述孔穴之燈具狀況中，習知之方式大部分 係藉連接在交流電源電壓與燈具間之一種所謂的點燈裝置 遂行脈衝式點燈。而具有可降低點燈電壓之燈具狀況中， 則無脈衝式點燈，由於上述之輔助點燈電極與孔穴的關係 ，故不須點燈裝置。進者，點燈電壓係由：以諧振電感器 與諧振電容器之串聯電路所組成之諧振電路的諧振所產生 。交流電源電壓係饋送於諧振電路。耦合於第1燈具端之 諧振電路中點係位在諧振電容器與諧振電容器間之連接點 上。 在無一般性之限制下，假設須具有上述之孔穴時，其係 位設在：至耦合於第1燈具端部之燈具電極的饋電引線上。 200304163 而下述之諸實施例中，用於其他狀況時，則係適當的配設 於不同之端部位置。 第2燈具端部係耦合於非接在諧振電路中點之諧振電容 器的另一極上。故燈具乃和諧振電容器形成並聯連接。倘 以諧振頻率激勵諧振電路時，如以上述之輔助點燈電極及 孔穴完成了點燈電壓之降低，則跨越燈具上所形成之電壓 即足以點亮燈具。而如交流電源電壓爲方波之形式時，則 毋須符合於諧振電路諧振頻率之交流電源電壓的基波 (fundamental);進者，爲了激勵諧振電路，則可利用交流 電源電壓中各種諧波，而最好是利用第3、第5或第7次 諧波。 倘希作諧振電路之對稱設計，諧振電感器可予分成兩個 組件之諧振電感器。各交流電源電壓之一極藉一組件電感 器而連接於諧振電容器，如是，燈具乃與之即成爲並聯之 連接。 惟此際在輔助點燈電極之一端部上，於諧振時，即需提 供一更高於橫跨諧振電容器所呈現之點燈電壓的高電壓。 依本發明，此一高壓電係藉將橫跨於諧振電感器所呈現之 電壓予以饋送至一點燈變壓器的一次繞組中而達成。而在 二次繞組處，點燈變壓器係提供諧振電感器之電壓，該諧 振電感器係倍數於變壓器之比率者。二次繞組之第1端部 係耦合於輔助點燈電極所用之端部。二次繞組之第2端部 可予連接至電路配置之各不同的電位上，其可予耦合至諧 振電感器兩個端部中之一或至第2燈具端部。依本發明， 200304163 變換比率之選擇爲，在諧振電路之諧振操作期間，於第1 燈具端部與輔助電極端部間所呈現之電壓係足以在孔穴內 產生UV輻射之電壓。 輔助點燈電極與第2燈具端部間所建立之電壓對於選擇 二次電感器第2端部之耦合亦甚重要。較高之電壓値可使 燈具產生較高之場強度（field strength)，因而可點亮燈具 。依本發明，二次繞組之第2端部乃因之耦合於諧振電路 之該中點上。 依本發明，關於上述燈具之場強度，點燈變壓器之繞組 指向（winding sense)的選擇使得二次繞組上之電壓予以極 性化，而讓燈具兩個端部間之電壓成爲相加而非相減，也 就是說，在參考第2燈具端部下，於輔助點燈電極端部上 之電壓係高於在第1燈具端部上之電壓。 如上述，依本發明，係將諧振電感器上之電壓予以饋送 至點燈變壓器之一次繞組中。故諧振電感器及點燈變壓器 通常乃各須一組件。依本發明，爲了儉省一個組件，乃將 諧振電感器用作點燈變壓器之一次繞組。因之，本發明之 一優點係點燈變壓器不須提供另外單獨之配件。任何狀況 中所呈現之諧振電感器均僅爲由二次繞組之延伸。 在一照明系統中，包括有上述電路配置之一操作裝置的 燈具端部係連接以燈具，連接於輔助點燈電極端部之一輔 助點燈電極可配設在燈具放電容器附近之任何所希的一點 上。因之，燈具之點燈即可藉上述之場強度而達成之。倘 封裝饋電引線至一電極之燈具玻璃本體具有孔穴時，爲了 200304163 產生uv輻射，則輔助點燈電極最好是繞著該孔穴作繞線。 (四）實施方式 如第1圖所示，一交流電源電壓U V b係自一交流電源電 壓1饋入一諧振電路，此一諧振電路包括一諧振電感器L 1 及一諧振電容器c 1之串聯電路。諧振電感器L 1及諧振電 容器C 1間之連接點乃形成一諧振電路中點2。諧振電路中 點2係連接於第1燈具端部J 1，而高壓放電燈Lp之第1 電極則係連接於該第1燈具端部J 1。非接於諧振電路中點 2之諧振電容器C 1之端部係連接於第2燈具端部J2，而高 壓放電燈Lp之第2電極則連接在該第2燈具端部J2。 諧振電感器L 1係形成點燈變壓器之一次繞組。而電感 器L2則形成點燈變壓器之二次繞組。電感器L2之第1端 部係連接用於輔助點燈電極之端部J 3。輔助點燈電極係環 繞至燈具Lp第1電極之饋電引線作圍繞，並連接於端部 J3 ° 爲了點亮燈具，交流電源電壓1係輸出一方波之交流電 源電壓Uvb，該電壓Uvb具有諧振電路諧振頻率附近之諧 波。此乃產生橫跨諧振電容器C 1之點燈電壓U c，而可藉 端部J 1及：ί 2予以饋送至燈具Lp。爲了令點燈電壓U c足 以點亮燈具Lp，在端部J 1及J2間務須提供超過點燈電壓 U c之電壓U L 2方可。此係用於點燈變壓器之變換比率値選 擇大於1之狀況。 在端部J 3及J 2間形成有電壓U z。而點燈電壓之準位 (1 e v e 1)少有嚴苛之要求。因之，依本發明，點燈變壓之繞 200304163 組指向（winding sense)乃選擇爲設成如圖示之兩只電感器 L 1及L 2。依上述之繞組指向，U z係等於電壓U c與U L 2 間之絕對値之和且並無差異。 第1圖中，諸構件之具體數據可列示如下： 交流電源電壓Uvb之値選擇爲1 80V，諧振電感器L1之 値爲180μΗ，諧振電容器C1之値爲2.2nF，點燈變壓器之 變換比率爲6，則交流電源電壓U c b之頻率在約5 1 k Η z時 ，電壓UL2之峰値可高達4kV。 (五）圖式簡單說明 本發明將佐以附圖說明一可行之代表性實施例。 第1圖爲依本發明一代表性實施例之電路配置連接圖。 主要部分之代表符號說明 1 交 流 電 壓 源 2 中 點 L 1 諧 振 電 感 器 L2 電 感 器 C 1 諧 振 電 容 器 J 1 第 1 燈 具 端 部 J2 第 2 燈 具 丄山 m 部 J3 輔 助 點 燈 電 極端部 Lp 局 壓 放 電 燈 Uvb 交 流 電 源 電 壓200304163 (1) Description of the invention (The description of the invention shall state: the technical field, prior art, content, embodiments, and drawings of the invention.) (1) The technical field to which the invention belongs. , Which is characterized by a circuit configuration previously described, and is characterized by a lighting circuit configuration for high-pressure discharge lamps (hereinafter referred to as lamps). In addition, the present invention also relates to a lighting system having an operating device and a high-pressure discharge lamp. For the purpose of lighting, the lighting system has an auxiliary lighting electrode, and the operating device of the above-mentioned circuit configuration is provided with one end portion. For the lighting electrode. (II) The prior technical document WO 00/77826 (Van den Nieuwenbhuizen) discloses a high-pressure discharge lamp with two electrodes, in which a glass body has a cavity around a feed lead to one of the electrodes, and the cavity is located in the cavity. The glass electrode surrounded by a point is an auxiliary lighting electrode in the form of a wire loop. The wire loop is connected to its feed wire without a hole by an electrical connection. The benefit of this configuration is that it reduces the lighting voltage of the luminaire. By using the auxiliary lighting electrode, the dielectric impedance discharge can be excited in the cavity. As a result, UV radiation is generated, and ions are generated in the discharge space of the lamp for lighting. The lighting voltage of the lamp, that is, the voltage required for lighting, is reduced due to the above configuration, but the auxiliary lighting electrode must be high voltage at this time, at least a part of the advantage is reduced. Document W 0 0 1/5 9 8 1 1 is to solve this kind of problem. It is disclosed that the auxiliary lighting electrode is not directly connected to the electrode of the lamp. Furthermore, the primary winding of the transformer is connected between the two ends of the lamp, and the auxiliary lighting electrode is connected to the secondary winding voltage which can be stepwise increased compared with the voltage of a 200304163 secondary winding. However, the disadvantage of this solution is that the cost of the transformer will be very high. (3) Summary of the invention The object of the present invention is to provide a circuit configuration as described in the preamble to the first item of the scope of patent application, which can achieve the lighting of the high-pressure discharge lamp at low cost. The characteristics of the circuit configuration to achieve this purpose are as defined after the "Primary Features" in the second paragraph of the scope of patent application. Furthermore, another object of the present invention is to provide a lighting system having the features as described in the fifth item of the patent application scope. And other advantages and characteristics of the present invention can be found in the dependent claims. The lamp of the present invention is an AC voltage lamp that feeds AC voltage with an AC power source. In particular, for engineering applications, the AC power supply voltage is preferably in the form of a square wave and is provided by a full bridge consisting of four electronic switching elements. In the case of conventional lamps without the above-mentioned holes, most of the known methods are pulsed lighting using a so-called lighting device connected between the AC power supply voltage and the lamp. In the case of lamps with a lowering lighting voltage, there is no pulse-type lighting. Due to the above-mentioned relationship between the auxiliary lighting electrode and the hole, no lighting device is required. Furthermore, the lighting voltage is generated by the resonance of a resonant circuit composed of a series circuit of a resonant inductor and a resonant capacitor. The AC power supply voltage is fed to the resonance circuit. The midpoint of the resonant circuit coupled to the first lamp end is at the connection point between the resonant capacitor and the resonant capacitor. Without general restrictions, if it is necessary to have the above-mentioned hole, its position is set on the feed lead to the lamp electrode coupled to the end of the first lamp. 200304163 In the following embodiments, when it is used in other situations, it is appropriately arranged at different end positions. The end of the second lamp is coupled to the other pole of the resonant capacitor which is not connected to the midpoint of the resonant circuit. Therefore, the lamp is connected in parallel with the resonant capacitor. If the resonant circuit is excited at the resonant frequency, if the lighting voltage reduction is completed with the above-mentioned auxiliary lighting electrodes and holes, the voltage formed across the lamp is sufficient to light the lamp. If the AC power supply voltage is in the form of a square wave, the fundamental wave of the AC power supply voltage that meets the resonant frequency of the resonant circuit is not required. In order to stimulate the resonant circuit, various harmonics in the AC power supply voltage can be used. It is best to use the 3rd, 5th, or 7th harmonic. If the symmetrical design of the resonant circuit is desired, the resonant inductor can be divided into two components. One of the AC power supply voltages is connected to the resonant capacitor through a component inductor. If so, the lamp is connected in parallel with it. However, at this time, at one end of the auxiliary lighting electrode, at the time of resonance, it is necessary to provide a higher voltage than the lighting voltage appearing across the resonant capacitor. According to the present invention, this high-voltage system is achieved by feeding a voltage across the resonant inductor to a primary winding of a point lamp transformer. At the secondary winding, the lighting transformer provides the voltage of the resonant inductor, which is a multiple of the transformer ratio. The first end of the secondary winding is coupled to the end used for the auxiliary lighting electrode. The second end of the secondary winding can be connected to different potentials of the circuit configuration, which can be coupled to one of the two ends of the resonant inductor or to the end of the second lamp. According to the invention, the 200304163 conversion ratio is selected such that during the resonance operation of the resonance circuit, the voltage presented between the end of the first lamp and the end of the auxiliary electrode is a voltage sufficient to generate UV radiation in the cavity. The voltage established between the auxiliary lighting electrode and the end of the second lamp is also important for selecting the coupling of the second end of the secondary inductor. Higher voltages can produce higher field strength in the luminaire, so it can illuminate the luminaire. According to the invention, the second end of the secondary winding is therefore coupled to the midpoint of the resonant circuit. According to the invention, regarding the field strength of the lamp, the selection of the winding sense of the lighting transformer causes the voltage on the secondary winding to be polarized, so that the voltages between the two ends of the lamp are added instead of phased. That is, the voltage at the end of the auxiliary lighting electrode is higher than the voltage at the end of the first lamp under the reference end of the second lamp. As described above, according to the present invention, the voltage on the resonant inductor is fed to the primary winding of the lighting transformer. Therefore, resonant inductors and lighting transformers usually require one component each. According to the present invention, in order to save a component, a resonant inductor is used as a primary winding of a lighting transformer. Therefore, one advantage of the present invention is that the lighting transformer need not be provided with a separate accessory. The resonant inductor presented in any case is only an extension of the secondary winding. In a lighting system, a lamp end including an operating device of one of the above-mentioned circuit configurations is connected to the lamp, and one auxiliary lamp electrode connected to the end of the auxiliary lamp electrode may be arranged at any desired position near the lamp discharge capacitor. On one point. Therefore, the lighting of the lamp can be achieved by the above field strength. If the glass body of the lamp that encapsulates the feed lead to an electrode has a hole, in order to generate UV radiation for 200304163, the auxiliary lighting electrode is preferably wound around the hole. (IV) Embodiment As shown in FIG. 1, an AC power supply voltage UV b is fed from an AC power supply voltage 1 to a resonance circuit, and the resonance circuit includes a series connection of a resonance inductor L 1 and a resonance capacitor c 1 Circuit. The connection point between the resonant inductor L 1 and the resonant capacitor C 1 forms a midpoint 2 of a resonant circuit. The middle point 2 of the resonance circuit is connected to the first lamp end J 1, and the first electrode of the high-pressure discharge lamp Lp is connected to the first lamp end J 1. The end of the resonance capacitor C1 not connected to the midpoint 2 of the resonance circuit is connected to the second lamp end J2, and the second electrode of the high-pressure discharge lamp Lp is connected to the second lamp end J2. The resonant inductor L 1 forms the primary winding of a lighting transformer. The inductor L2 forms the secondary winding of the lighting transformer. The first end portion of the inductor L2 is connected to the end portion J 3 for auxiliary lighting electrodes. The auxiliary lighting electrode is surrounded by the feed lead of the first electrode of the lamp Lp, and is connected to the end J3 ° In order to illuminate the lamp, the AC power voltage 1 outputs a square wave of the AC power voltage Uvb, which has a resonance Harmonics near the resonant frequency of the circuit. This is to generate the lighting voltage U c across the resonant capacitor C 1, which can be fed to the lamp Lp via the terminals J 1 and: ί 2. In order to make the lighting voltage U c sufficient to light the lamp Lp, it is necessary to provide a voltage U L 2 in excess of the lighting voltage U c between the ends J 1 and J 2. This is used for the conversion ratio of the lighting transformer. A voltage U z is formed between the ends J 3 and J 2. The lighting voltage level (1 e v e 1) has few strict requirements. Therefore, according to the present invention, the 200304163 group of winding senses for lighting and voltage transformation are selected as the two inductors L 1 and L 2 as shown in the figure. According to the winding direction, U z is equal to the absolute sum of the voltages U c and U L 2 without any difference. In Figure 1, the specific data of the components can be listed as follows: The 电源 of the AC power supply voltage Uvb is selected as 1 80V, the 値 of the resonant inductor L1 is 180 μΗ, the 値 of the resonant capacitor C1 is 2.2 nF, and the conversion ratio of the lighting transformer is When the frequency of the AC power supply voltage U cb is about 5 1 k Η z, the peak value 电压 of the voltage UL2 can be as high as 4 kV. (V) Brief Description of the Drawings The present invention will be described with reference to the drawings to illustrate a feasible representative embodiment. FIG. 1 is a circuit configuration connection diagram according to a representative embodiment of the present invention. Description of the representative symbols of the main parts 1 AC voltage source 2 Midpoint L 1 Resonant inductor L2 Inductor C 1 Resonant capacitor J 1 The first lamp end J2 The second lamp Sheshan m section J3 The auxiliary lighting electrode end Lp partial pressure Uvb AC supply voltage for discharge lamp